No good
The hair is the resize of the small sprite and the big stage select sprite version from MMX4, isn't? Let's have the hair for the last, but I personally would use Akiha and Aoko hair from Melty Blood as a base for making a better flowing hair. But not now, first fix those animations, shall we?
Are you using the smaller version as base to get the general idea, right? First it would be a good idea to check out the proportions, make some sticky figures using vector and make it bigger, then you start editing it overall. Just a thought.
PS: Just hope my 'harsh' critique don't scare you too much. Just pointers to make this a better character.

Zero actually is a different style , I created a new polishment to remember car paint and choose the big rebel hair... Btw heres the new attack, 100% done! The saber effect is not the same that will be used ingame, I drew this one just to showoff the sprite!